Published July 7, 2021
| Version 2021.04
Dataset
Open
SeaFlux data set: harmonised sea-air CO2 fluxes from surface pCO2 data products using a standardised approach
Authors/Creators
- 1. Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zürich, Switzerland
- 2. Columbia University and Lamont Doherty Earth Observatory, Palisades NY, USA
Contributors
- 1. Max Planck Institute for Meteorology, 20146 Hamburg, Germany
- 2. Columbia University and Lamont Doherty Earth Observatory, Palisades NY, USA
- 3. Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zürich, Switzerland
- 4. Laboratoire des Sciences du Climat et de l'Environnement, Institut Pierre Simon Laplace, Gif‐Sur‐Yvette, France
- 5. Atmosphere and Ocean Department, Japan Meteorological Agency, 1-3-4 Otemachi, Chiyoda-Ku, Tokyo 100-8122, Japan
- 6. Dept. - Geoscience, Environment & Society (DGES), Université Libre de Bruxelles, Bruxelles, CP16002, Belgium
- 7. Biogeochemical Signals, Max Planck Institute for Biogeochemistry, P.O. Box 600164, Hans-Knöll-Str. 10, 07745 Jena, Germany
- 8. National Institute for Environmental Studies (NIES), 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
Description
Fluxes calculated using standardised approach:
\(F\text{CO}_2=K_0 \cdot K_w \cdot (p\text{CO}_2^\text{sea} - p\text{CO}_2^\text{atm})\ \cdot (1 - [ice])\).
We provide each of the components to this equation to reduce the potential for errors in fluxes due to methodological differences.
The netCDFs contain the following data:
- fgco2_all_winds_products: the sea-air CO2 flux for all spCO2 products (6) and kws from all wind products (5).
- solWeis74: \(K_0\) is calculated using the Weiss (1974) parameterization with EN4 salinity and OISST temperatures
- kw_quadratic_scaled: \(k_w\) is calculated for winds with each being scaled independently to 14-C bomb flux estimate of 16.5 cm/hr using the quadratic formulation by Wanninkhof (1992).
- CCMPv2
- ERA5
- JRA55
- NCEP1
- NCEP2
- spco2_SOCOM_unfilled: \(p\text{CO}_2^\text{sea}\) downloaded from various sources contains the following products:
- CMEMS_FFNN
- CSIR_ML6
- JENA_MLS
- JMA_MLR
- MPI_SOMFFN
- NIES_FNN
- spco2_filler: scaled version of the Landschützer et al. (2020) climatology used to fill missing regions of spco2_SOCOM_unfilled
- pco2atm: \(p\text{CO}_2^\text{atm}\) is calculated from NOAA's marine boundary layer product with ERA5 mean sea level pressure corrected for pH2O
- ice: \([ice]\) is the ice fraction from the OISST product
- area_ocean: the surface area of the ocean including fractional area of the coastal regions
Units are listed in the metadata of each of the netCDF variables.
Notes
version 2021.04 now extends the variables to calculate fluxes from 1982-2020. The comparison period for fluxes is now limited to 1990-2019 (30 years). The area contains coastal fraction coverage. A missing strip along the longitude 179.5°E is filled in. Negative values of pCO2 are limited to 50 µatm (primarily affects JENA in Hudson Bay).
version 2021.02 calibrates kw with 14-C bomb estimated global average kw (16.5 ± 3.2 cm/hr) where the average is calculated without ice weighting (v2021.01 included ice weighting). Further, the date range of the data has been increased from 1982 to 2020 where possible (not possible for the scaling factor and pCO2 product).
Files
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Additional details
Related works
- Is cited by
- Journal article: 10.5194/essd-2021-16 (DOI)